Nut-lock.



No. 644,376. Patented Jan; I6, I900.

J. S. DUDDRIDGE.

NUT LOCK.

(Application filed July 81, .1899.)

(No Model.)

Illl

NITED STATES JOHN S. DODDRIDGE, OF RED CLIFF, vCOLORADO.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 641,376, dated January16, 1900.

Application filed July 31, 1899. Serial No. 725,638. (No model.)

To aZZ whom it may concern-.-

Be it known that 1, JOHN S. DODDRIDGE, a citizen of the United States ofAmerica, residing at Red Cliff, in the county of Eagle and State ofColorado, have invented certain new and useful Improvements inNut-Locks, of which the following is a specification.

My invention relates to an improvement in nut-locks, and more especiallyto that particular variety known as base-washer nutlocks, the objectbeing to provide a simple, strong, and inexpensive lock for the purposenamed which can be easily applied and will be effectual in accomplishingthe results sought to be attained by such an article.

With the foregoing object in View my invention consists in certain.novel features of construction and combinations of parts,which will bemore fully described hereinafter and particularly pointed out in theclaims.

In the accompanying drawings, Figure 1 is a sectional View of one formof my invention. Figs. 2 and 3 are views of the pronged washer or nutandclamp-plate, respectively; and Fig. 4 is a modification.

A represents a bolt with the usual thread 1 thereon.

B is a clamp-plate preferably made of malleable iron and having a hole 2therein to receive the bolt and one or more smaller holes 3 for apurpose to be mentioned. The clampplate serves, in the first place, asan ordinary washer, but more especially it is designed to lock the nutupon the bolt, and to this end it is constructed with one or more points4, adapted to be bent up against the side of the nut when the latter isscrewed tightly into place. The clamp-plate may be formed in anyconvenient shape, as square, triangular,

or in other form.

0 indicates a pronged nut or washer hav ing a central hole 6 to receivethe bolt and provided with one or more prongs 7 of hardened steel tocorrespond with and pass through the hole or holes 3 in the clamp-plate.These prongs are longer than the thickness of the clamp-plate andpointed or sharpened at their ends for the purpose of penetrating thewood or material with which they come in contact when in position.

The locking is done in the following Way: The bolthaving been passedthrough the timber, rail, or what not, the clamp-plate is first placedupon it, and then the washer, with the prongs, inserted through theholesv in the clamp-plate. Finally the nut8 is screwed on tightly, thusforcing the prongs into the wood or iron and in that way locking theclampplate against turning. The point or points on the clamp-plate arethen bent immediately adjacent to the edge of the nut and washer untilsaid point lies flat against the nut, whereby the latter is lockedpermanently in place.

In the form shown in Fig. 4 the clamp-plate has no holes for receivingprongs. In this form the clam p-plate is preferably made triangular inshape, one side of the triangle being adapted to rest against thebase-flange of the rail or fish-plate, this form of nut-lock be ingadapted for use with the fish-plates of rails. In this form the prongedwasher may be dispensed with and the point or points on the clamp-plateare bent to lie flat against the nut to lock it.

Having thus described myinvention, what I claim as new, and desire tosecure by Letters Patent, is-- 1. The combination with a bolt and nut,of an apertured clamp-plate having a point on one side thereof, apronged washer, the prongs of which are of greater length than thethickness of the clamp-plate, said prongs being adapted to be embeddedin the part through which the bolt passes whereby the washer andclamp-plate are locked against turning, said plate and Washer held inplace by the nut and the point on the clamp-plate bent against the sideof the nut to lock it against turning.

2. The combination with a bolt and nut, of an apertured clamp-platehaving a point or points on the'side thereof, a pronged washer, theprongs of which are adapted to enter apertures in the clamp-plate and beembedded JOHN S. DODDRIDGE.

In presence of- GEO. E. BOWLAND, N. BUcHHoLz.

